package com.bobo.util;


import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class MD5 {
    public static String md5(String password) throws NoSuchAlgorithmException {
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(password.getBytes());
        return new BigInteger(1, md.digest()).toString(16);
    }

    public static String md5(String username, String password)
            throws NoSuchAlgorithmException {
        MessageDigest md = MessageDigest.getInstance("MD5");
        md.update(username.getBytes());
        md.update(password.getBytes());
        return new BigInteger(1, md.digest()).toString(16);
    }

    private final static String[] hexDigits = {"0", "1", "2", "3", "4", "5",
            "6", "7", "8", "9"};

    private static String byteArrayToHexString(byte[] b) {
        StringBuilder resultSb = new StringBuilder();
        for (byte aB : b) {
            resultSb.append(byteToHexString(aB));
        }
        return resultSb.toString();
    }

    private static String byteToHexString(byte b) {
        int n = b;
        if (n < 0)
            n = 256 + n;
        int d1 = n / 16;
        int d2 = n % 16;
        return hexDigits[d1] + hexDigits[d2];
    }

    public static String md5Encode(String origin) {
        String resultString = null;

        try {
            resultString = origin;
            MessageDigest md = MessageDigest.getInstance("MD5");
            resultString = byteArrayToHexString(md.digest(resultString
                    .getBytes()));
        } catch (Exception ignored) {

        }
        return resultString;
    }


}
